Retired Firefighter Michael Duffy, a 20-year veteran of the department who spent time at Ground Zero after the terror attacks, died on Aug. 8, officials said Thursday.

Duffy joined the FDNY in 1982 and spent his entire career at Engine 310 and Ladder 174 on Snyder Ave. in East Flatbush, known as “Snyder Island.”

“He comes from a very proud firehouse,” Uniformed Firefighters Association President Gerard Fitzgerald said. “This is a terrific loss to the members of the firehouse, the retirees and people in the Gerritsen Beach community where he lived.”

Duffy, 63, retired from the FDNY in 2002.

On 9/11, 343 firefighters and 23 NYPD cops were killed when terrorists flew two jumbo jets into the World Trade Center.

As of July 15, 157 FDNY members — including firefighters, EMS personnel, civilian employees and fire marshals — have died of 9/11-related illnesses, department officials said.

By the end of 2016, 132 additional NYPD cops had died of illnesses that can be linked to their time at Ground Zero, officials said.

Duffy is survived by his wife, Corrina. Calls to family members were not immediately returned.

Services will be held Friday at the James P. Byrnes Funeral Home on Gerritsen Ave. A funeral mass will be held at Resurrection Church, also on Gerritsen Ave., on Saturday at 10:30 a.m.

In lieu of flowers, the family asks mourners to make donations to St. Judes Medical Center, New York Presbyterian Burn Center and the FDNY Fire Family Transport Foundation, which shuttles firefighters and their families to medical appointments.